examples reflect carefree and humorous, such as dragons circling the rotund jars. Even more uncharacteristic for baekja, and especially difficult is painting them with copper-red decorations. The pieces with the copper-red that have been successfully produced originated from the 18th century. Production Baekja is shaped from well-refined white clay (kaolin or petuntse), glazed with feldspar, and then fired. Although the name is derived from its basic color, minute color differences often appear according to the properties of the clay and the glaze, as well as the firing method and temperature: some porcelains are pure white, while others may have slight tints of light blue or light yellow. White porcelain wares are made at more than 1300 degrees Celsius inside a kiln while the blue green celadon was made under 1200 degrees Celsius. When comparing Joseon White porcelain to Goryeo, the wares prove to be both stronger and more durable another reason they were favored during the Joseon dynasty. Uses Baekja was manufactured throughout the Joseon Dynasty and was widely used by people in their daily lives. During the 15th and 16th centuries, dishes, bowls, bottles, and jars of simple yet elegant forms and shapes were preferred. Departing from everyday practical use, Baekja also had ceremonial uses, such as burial vessels. Historically baekja had been used as placenta jars, usually made in sets of two, one inside the other, for holding and burying the placenta of a prince or princess. In the 18th century, large bulbous vessels known as moon jars became fashionable. Gallery See also Blue and white porcelain Korean pottery and porcelain Dehua porcelain References Further reading External links Gallery of Korean Pottery and Porcelain at Korean Overseas Culture and Information Service (KOIS) Korean pottery Joseon dynasty works Porcelain